Being away from the kids

My Taiwanese sister-in-law, who left several years ago for the UK is thinking about moving back to Taiwan with her new husband. He’s got kids from a previous marriage that would stay with their mother in the UK.

I know that being separated from aging loved ones is a hardship that most foriegners recognize but seldom speak of. Separation from one’s children even less so. I’m hoping to find people who would be willing to share their experiences to help my brother-in-law in making this decision.

Thanks in advance.